Impeovement in centeifugal machines foe



R. J. BARR.

Centrifugal Sugar-Machine.

No. 80,702. Patented Aug. 4.1868.

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ROBERT, J. BARR,- OF PHILADE PHIA; PENNSYLVANIA.

Letters Patent No. 80,702, dated August 4,,1868.

IMPROVEMENT IN GENTRIFUGAL MACHINES FOR FILTERING, DRAWING, AND DRYING.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, Bonner BARR, of Philadelphia, Pennsylvania, haveinvented an Improvement in Centrifugal Drying-Machines; andlI do herebydeclare the following to be a full, clear,'ond exact description of thesame.

My invention consists of a forked bar, having a'yielding bearing, and sosecured adjacent to and bearing against the suspended shaft of acentrifugal drying-machine, that the gyration of the said shaft isprevented, while the ready introduction or removal of, the material tobe dried is notinterfered with. v

In order to enable others skilled in the art to make and use myinvention, I willnow proceed to describe its construction and operation,reference being bad to the accompanying drawing, which forms a part ofthis specification, and in which,

Figure 1 is a vertical section of my improved centrifugaldrying-machine,

Figure 2 a plan view, and i v Figure 3 a perspective view of'a portionof my invention, drawn to an enlarged scale.

A is astationary cylindrical case,.which is suspended from the-ceiling,or otherwise supported, and B is a cylindrical-vessel with perforatedsides, which is suspended within the case A by a vertical shaft, 0, theonly bearing of the shaft being that to which a collar, a, near theupper end of the shaft, is adapted.

To the casing A is hinged a frame, D, and through cross-pieces c e ofthelatter passes a bar, E, forked at its inner end, which embraces theshaft G, and around the bar, between a shoulder on the same and thecrosspiece 0, is c'oilcd a spring, {,the force of whicln andthecon'sequent pressure'of the bar upon the shaft, is regulated by anut, z". 1 l

The opening in the cross-piece e, through which tlic barE passes, iswider than the bar, so that the latter can vibrate laterally to alimited extent, for a purpose described hereafter.

In the inner edge of the forked end of thebar is a dove-tailed groove orchannel, y, filled with lignum-v vitae or other hard wood, whichprojects slightly beyond the edge of the bar,oand serves as a bearingfor the shaft, (see fig.

In the centrifugal machines first constructed, for drying sugar andother materials, the shafts rested in steps and bearings whichmaintained them permanently vertical, heavy-foundations and a largeamount of room 7 being required, while the machines, as well asthe'buildings in which they were used, were subject to constant anddestructive vibrations.

Most of these objections arev overcome by removing the steps andsuspending the shafts, as above 1 described. The tendency of the shaft,however, to vibrate or gyratc at its lower and during its revolution,and when the material is not evenly distributed in the vessel B, rendersnecessary the constant services of an attend ant, who bears with aforked bar against the side of the shaft whenever the latter begins togyrate.

By my above-described improvements the labor and expense of an attendantare avoided, the forked barE boating constantly against the shaft, andspeedily reducing any gyration resulting from the vessel B beingunevenly loaded, but yielding suiliciently, before the gyration isreduced, tovprcvent the violent shocksand vibrations which occur when anunyielding bearing is employed.

It shou;ld be understood that the forked rod is prevented from fallingto a point below that shown in fig. '1 by lugs at a; on the side of thecase A, which serve to support the hinged frameDJ It is during the timeof charging the machine that the shaft is most liable to gyrate, and theforked rod most needed, and the latter being of inconsiderable width,and occupying but asmall space at one side of the machine, does notinterfere with the operation of charging, while, after stopping themachine preparatory to removing the contents of the vessel B, the hingedrodand its frame can be readily thrown back out of the way,

as indicated by the dotted lines in fig. l. a V

Without limiting myselt'to the precise construction and arrangement ofparts herein described, I claim as my invention, and desire to secure byLetters Patent- 1. A. forked bar, E, having a yielding bearing, andarranged adjacent to and bearing with its forked end against thesuspended shaft of a centrifugal drying-machine, substantially as andfor the purpose described.

2. Thesaid bar, secured in a frame hinged to the outer casing or otherpermanent part of the machine, for the purpose set forth.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

R. J. BARR.

Witnesses:

J OHN WHITE, 0. B." PRICE.

